* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 10px;
}

.nav {
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  overflow: hidden;
}

.icon .logo {
  width: 5rem;
  height: 5rem;
}

.icon .title {
  font-size: 2rem;
  line-height: 6rem;
}

.nav--scrolled {
  box-shadow: 0 4px 6px -1px rgba(65, 64, 64, 0.1),
    0 2px 4px -1px rgba(139, 138, 138, 0.06);
  z-index: 100;
}

.nav-link {
  color: #121212;
}

.nav-pills .nav-link.active,
.nav-pills .show>.nav-link {
  color: #fff;
  background-color: #121212;
}

.mid {
  padding-top: 8rem;
}

.mid .slgan-warp {
  height: 8rem;
  line-height: 8rem;
}

.mid .slgan-warp .slgan {
  font-size: 3rem;
  font-weight: 900;
  width: 100%;
  text-align: center;
}


/* 基础按钮样式 */
.btn {
  display: flex;
  align-items: center;
  padding: 8px 20px;
  margin: 10px 0;
  border-radius: 16px;
  text-decoration: none;
  min-width: 200px;
  transition: transform 0.2s, opacity 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
  opacity: 0.9;
}

/* 图标样式 */
.icon {
  font-size: 32px;
  margin-right: 12px;
}

/* 文字排版 */
.text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.small-text {
  font-size: 10px;
  font-weight: 400;
  text-transform: uppercase;
}

.large-text {
  font-size: 19px;
  font-weight: 600;
}

/* 风格 1：深色按钮 */
.btn-dark {
  background-color: #121212;
  color: white;
}


/* .download {
  border-radius: 0.8rem;
  width: 80%;
  display: flex;
  align-items: center;
  justify-content: space-around;
} */

.download-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.dropdown-menu {
  width: 80%;
}

.iconfont {
  font-size: 2rem !important;
}

.b {
  width: 100%;
  /* height: 500px; */
}

.introduce {
  /* background-color: rgb(248, 250, 252); */
  align-items: center;
  text-align: center;
  font-size: 2rem;
  padding-top: 10rem;
  padding-bottom: 12rem;
}

.introduce2 {
  align-items: center;
  text-align: center;
  font-size: 2rem;
  padding-top: 10rem;
  padding-bottom: 12rem;
}

.footer {
  height: 3rem;
  font-size: 1.3rem;
}

.beian {
  text-align: center;
}